1

Some APT packages upgrade without asking any questions, e.g. if no configuration files are changed. Others don't.

I would like to check if a package needs or "wants" interaction on upgrade.

I do not mean forced, non-interactive installs/upgrades like https://serverfault.com/a/227194/174041. I would simply like to automate "safe" upgrades (I have unattended security upgrades anyway, but would like to also automatically upgrade packages that can be relatively safely upgraded in automated manner).

1
  • @anx: Back out and warn / produce error, abort the whole effort. – LetMeSOThat4U Jan 29 '19 at 8:18
1

If you use

apt-cache show postifx

you will see it depends on debconf which is commonly used to ask questions during package setup. And this shows:

apt-cache show debconf
...
Description-en: ...Packages use Debconf to ask questions when they are installed.
...

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